Gog Tatra C Photochromic Sunglasses74.99Buy!£TrekkinnDelivery: in United Kingdom ReportSpecifications:- Frame Material: rilsan clear G850- Lens Material: photochromic- Lens Category: 2~4Technology: Uv Protection Lens:- UV400 filter blocks all light rays with wavelengths up to 400 nanome more→ters to guarantee 100% protection against UVA, UVB and UVC radiation. All GOG sunglasses and ski goggles are equipped with UV400 lens filter to protect eyes from harmful UV radiation.Chromatic G-lens:- Photochromic lenses with color mirror coating fficiently adapt to various light conditions. Under the influence of solar radiation CHROMATIC lenses are ranging from cat. 1 to cat. 3. The photochromic lenses guarantee permanent viewing comfort in various shades of light. Additional mirror coating guarantees …